I am looking for some advice. I put my standard BF XR6 on the dyno on the weekend and it made 139.0 rwkW. Its a 6 speed manual. I was just wondering if this is a good, average or bad figure compared to others.

One of the guys in a BA XR6 pulled 143, though his car only has 9,000kms on it compared to mine with 80,000 already. If this is a bad figure what can i do to improve it and regain those lost kWs

I am just concearned because the BA has 182kWs and my BF is supposed to have 190kW at the flywheel. So basically it seems like i have lost a substantial amount. I know when its converted to rear wheel it is a much smaller gap.

That is true, but if i have lost kWs then any other BA/BF the adds exhaust etc will still gain more over me than if mi was to do it. Could it be something like changing my leads and plugs, or some other form of service. The car has full service history but it is getting towards high kms.

The figure you are worried about (135ishRWKW) is what it would be. There is a subtancial drop in power when it travels from the flywheel to the ground - the flywheel figure is much higher and used by motoring companies to make a car lok more powerful than it is; by that i mean the car as a whole, not the power of the engine. The BA engine is the best engine Ford has put into a Falcon and the figures are easily raised with very minor mods.

The KW figure is useless, the RWKW figure is the one you want. A car is useless if it cant transfer the power to the ground.

Do a few mods - cold air intake (larger snorkel and/or secondary intake), exhaust, extractors, ECU chip and tune will have your figures in the high 150s (RWKW) I would imagine. If you want to take it further, go and grab a Turbo setup off one of the other BA XR6Ts. You'll easily be up at the 200-250RWKW mark. With a cam + porting you'll probably be in the 300RWKW zone, a figure that falls just short of double the power you did have at the flywheel!

A bigger turbo, better intake manifold and things of the sort can push you up to around 400RWKW.

How far you want to take it is up to you (and your $$ ) but for now, you have nothing to worry about with your figures - just understand that KW and RWKW are 2 VERY DIFFERENT figures. The extra few RWKWs your mate's car has is either due to a different dyno or that it has traveled like 71,000km less than yours - both are as equally as likly as each other.

you think porting and 'a cam' will bring up 50-100rwkw?
and you do realise the BA+ 4Ls are DOHC right?
You wind the boost up/ slap on a bigger turbo, not port the head and add a cam in DOHC turbos.
Also the BA motor isnt the best, how many kw does the FG have?
Also fwkw does not make a car look more powerful than it actually is, and if you'd believe it, its not all about rwkw either, theres something known as the power-to-weight ratio. bit more important than a rwkw figure.

I don't think you have a loss in power 139RWKW's isn't too bad, could be a little down, but not by much.
compared to my EL XR6 it goes as follows
EL- 164FWKW then 105RWKW
BF- 190FWKW then 139RWKW

Running a car on a dyno can vary from day to day with different humidity, heat and even a slight bit through tyre pressures and the type of air filter your using. I wouldn't be worried about that figure at all. Just do a few of the above mentioned mods and see where you can pick up some KW's

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